While Hawaii’s Mauna Loa’s can boat 56,000 feet of lava flows, for the largest volcano in our solar system you have to go out of this world. To Mars, in fact, where the Olympus Mons shield volcano dwells. Nearly three times higher than Mount Everest appears above sea level, Olympus Mons has been measured at an astounding 16 miles high, and its edifice is thought to be 370 miles wide. Put simply, it is a volcano virtually the size of France. Disaster movie makers should prepare their scripts accordingly.